leave the high beams alone, HID's are not recommended as they take too long to reach max bright, and switching them on/off frequently is not good.
I put 4300k 3five Morimoto's in my lows and am quite satisfied.
I am not affiliated, but these are good people : ( get the CanBus version )
H7: Morimoto Elite HID System - HID Systems from The Retrofit Source Inc